* {
    margin: 0;
    padding: 0;
}

nav {
    display: flex;
    justify-content: space-between;
    padding: 20px;
    background-color: rgb(75, 125, 219);
    color: white;
}

.content {
    display: flex;
}

ul {
    width: 100px;
    background-color: rgb(75, 125, 219);
    line-height: 50px;
    text-align: center;
    color: white;
}
main {
    flex: 1;
    padding: 30px;
}

main button {
    margin-top: 20px;
    margin-bottom: 5px;
    width: 100px;
    height: 30px;
    border-radius: 10px;
    background-color: limegreen;
    border: none;
}

main .sousuo input {
    width: 250px;
    height: 40px;
    padding-left: 20px;
    border-radius: 50px;
    border: 1px solid gray;
    margin-right: 10px;
}

main .sousuo button {
    width: 70px;
    height: 30px;
    background-color: limegreen;
    border-radius: 30px;
    border: none;
}

.content main table {
    width: 100%;
    text-align: center;
    line-height: 40px;
}

.content .foot {
    text-align: center;
    line-height: 40px;
}

.content .foot span {
    border: 1px solid grey;
    width: 80px;
    height: 30px;
}

.content main table thead tr th:first-child {
    text-align: left;
}

.content main table tbody tr td:first-child {
    text-align: left;
}